Hot!ERR_SSL_PROTOCOL_ERROR on Google Chrome

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sforbus@atljewishacademy.org
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2019/08/13 08:40:20 (permalink)
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ERR_SSL_PROTOCOL_ERROR on Google Chrome

We are having a bizarre problem since updating to 6.2.1 (we updated due to a memory leak issue in 6.2.0).
 
Certain sites are giving us a ERR_SSL_PROTOCOL_ERROR only in Google Chrome. I have tried all the usual troubleshooting for this error, but the only thing that fixes it is restarting the fortigate. Two sites (facebook.com and login.renweb.com) both use TLS 1.3, but we can get to facebook without a problem and we cannot get to the other site. After rebooting the device, it works for several days and then starts behaving poorly again.
 
Other browsers work fine, including Internet Explorer, Edge (not Chromium based) and Firefox.
 
I have attempted to disable SSL certificate inspection, but that does not seem to affect the problem one way or another. I also tried putting the fortigate back on its factory certificate.
 
My next step will be to revert to 6.0 branch, where I did not experience this issue, but I figured I would post first to see if anyone had similar experiences.
 
#1

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    dxnet
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    Re: ERR_SSL_PROTOCOL_ERROR on Google Chrome 2019/08/19 23:26:32 (permalink)
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    Firmware 6.2.1 I have similar error, cant open https://www.whatsapp.com/ in Google Chrome, in IE works.
    I add exempt for ssl inspection (wildcard *.whatsapp.com), but it doesn't work. whatsapp in chrome works only ssl deep inspection is disabled
    post edited by dxnet - 2019/08/19 23:52:10
    #2
    sforbus@atljewishacademy.org
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    Re: ERR_SSL_PROTOCOL_ERROR on Google Chrome 2019/08/20 04:19:36 (permalink)
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    I have solved the problem by downgrading back to 6.0.5, I believe. It has been a couple of days and this problem has not resurfaced. I will see if it happens again.
    #3
    bbilut
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    Re: ERR_SSL_PROTOCOL_ERROR on Google Chrome 2019/08/20 05:23:32 (permalink)
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    Have you tried disabling QUIC protocol in Chrome?
    #4
    dxnet
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    Re: ERR_SSL_PROTOCOL_ERROR on Google Chrome 2019/08/21 02:36:48 (permalink)
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    I tried to disable QUIC, but it doesn't resolve problem
    also doesn't work https://serverfault.com/ and I add exempt for ssl inspection *.serverfault.com too
    And I noticed that I can't open this sites in Mozilla too.
    Works only in ie, edge
    #5
    dxnet
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    Re: ERR_SSL_PROTOCOL_ERROR on Google Chrome 2019/08/21 02:37:58 (permalink)
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    I tried to disable QUIC, but it doesn't resolve problem
    also doesn't work https://serverfault.com/ and I add exempt for ssl inspection *.serverfault.com too
    And I noticed that I can't open this sites in Mozilla too.
    Works only in ie, edge
    #6
    dxnet
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    Re: ERR_SSL_PROTOCOL_ERROR on Google Chrome 2019/08/24 02:07:50 (permalink)
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    So, I've solved the problem by downgrrading back to 6.2.0 (build 0866), ssl in Chrome works on all sites, where I had problem. (whatsapp.comhttps://serverfault.com)
    #7
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